我想问下为什么

bool list2::listdelet(int i, node *elem)

{

node *currentnode = m_pNode;

node *prenode = NULL;

if (i < 0 || i>m_length)

{

return false;

}

for (int count = 0; count < i; count++)

{

prenode = currentnode;

currentnode = currentnode->next;

}

prenode->next = currentnode->next;

elem->data = currentnode->data;

delete currentnode;

m_length--;

return true;

}

我delete currentNode的时候会报错：